0029195: OCAF - ensure thread safety for different documents.

[occt.git] / src / BinLDrivers / BinLDrivers_DocumentRetrievalDriver.cxx

diff --git a/src/BinLDrivers/BinLDrivers_DocumentRetrievalDriver.cxx b/src/BinLDrivers/BinLDrivers_DocumentRetrievalDriver.cxx
index 14728b3..7f0c488 100644 (file)
--- a/src/BinLDrivers/BinLDrivers_DocumentRetrievalDriver.cxx
+++ b/src/BinLDrivers/BinLDrivers_DocumentRetrievalDriver.cxx
@@ -91,7 +91,7 @@ void BinLDrivers_DocumentRetrievalDriver::Read
     TCollection_ExtendedString aFormat = PCDM_ReadWriter::FileFormat (aFileStream, dData);
 
     Read(aFileStream, dData, theNewDocument, theApplication, theProgress);
-    if (theProgress->UserBreak())
+    if (!theProgress.IsNull() && theProgress->UserBreak())
     {
       myReaderStatus = PCDM_RS_UserBreak;
       return;